Sunday morning in the Uptown neighborhood, a person was shot and killed by someone riding a bicycle, police said.

The victim was sitting in a vehicle in the 4600-block of North Clifton Ave. at about 8:10 a.m. when someone pulled up in a bicycle and shot the victim several times, police said.

The victim was pronounced dead at the scene. The shooter fled in an unknown direction.

Area North detectives are investigating.

The third fatality was a 19-year-old man who was fatally shot at about 3:30 p.m. Sunday while leaning against a parked vehicle in the 4000-block of South Calumet, police said. The victim was talking to an acquaintance when another vehicle pulled up and someone started firing several shots.

The men were shot near Seward Park on the Near North Side. A 54-year-old man was shot in his upper-right leg; a 43-year-old man was shot in the lower left leg and upper right arm; and a 28-year-old man was shot in the back. Two victims, ages 54 and 43, were hospitalized in stable condition. The 28-year-old was hospitalized in critical condition.